import { beforeEach, describe, expect, it, vi } from "vitest";

vi.mock("~/utils/db.server", () => ({
  db: {
    entityWebhook: {
      deleteMany: vi.fn(),
      findFirst: vi.fn(),
      findMany: vi.fn(),
      updateMany: vi.fn(),
    },
    entityWebhookLog: {
      create: vi.fn(async (args) => args.data),
    },
  },
}));

vi.mock("~/utils/url.server", () => ({
  getBaseURL: vi.fn((request: Request) => new URL(request.url).origin),
}));

// The shared outbound client resolves DNS and rejects hosts that resolve to
// internal addresses. Stub the resolver so public test hosts resolve to a
// public IP, while a chosen host simulates DNS rebinding to a metadata address.
vi.mock("node:dns/promises", () => ({
  lookup: vi.fn(async (hostname: string) => {
    if (hostname === "rebind.attacker.test") {
      return [{ address: "169.254.169.254", family: 4 }];
    }
    return [{ address: "93.184.216.34", family: 4 }];
  }),
}));

import { db } from "~/utils/db.server";
import { callEntityWebhooks, deleteEntityWebhook, getEntityWebhook, updateEntityWebhook } from "./entityWebhooks.db.server";

const entityWebhookMock = vi.mocked(db.entityWebhook, true);
const entityWebhookLogMock = vi.mocked(db.entityWebhookLog, true);

describe("entity webhook delivery", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    vi.stubGlobal("fetch", vi.fn(async () => new Response(null, { status: 204 })));
  });

  it("delivers allowed absolute webhook URLs", async () => {
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_absolute", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://tenant.example.com/api/rows"),
    });

    expect(fetch).toHaveBeenCalledWith("https://hooks.example.com/rows", expect.objectContaining({ redirect: "manual", signal: expect.any(AbortSignal) }));
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_absolute", logId: "log_1", status: 204 } });
  });

  it("delivers webhooks at request-relative endpoints resolved against the base URL", async () => {
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_relative", entityId: "entity_1", action: "created", method: "POST", endpoint: "/webhooks/rows" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://tenant.example.com/api/rows"),
    });

    expect(fetch).toHaveBeenCalledWith("https://tenant.example.com/webhooks/rows", expect.objectContaining({ redirect: "manual", signal: expect.any(AbortSignal) }));
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_relative", logId: "log_1", status: 204 } });
  });

  it("follows safe redirects after validating the redirect target", async () => {
    vi.stubGlobal(
      "fetch",
      vi
        .fn()
        .mockResolvedValueOnce(new Response(null, { status: 307, headers: { location: "https://hooks.example.com/rows-next" } }))
        .mockResolvedValueOnce(new Response(null, { status: 204 }))
    );
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_redirect", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://tenant.example.com/api/rows"),
    });

    expect(fetch).toHaveBeenNthCalledWith(1, "https://hooks.example.com/rows", expect.objectContaining({ method: "POST", redirect: "manual" }));
    expect(fetch).toHaveBeenNthCalledWith(2, "https://hooks.example.com/rows-next", expect.objectContaining({ method: "POST", redirect: "manual" }));
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_redirect", logId: "log_1", status: 204 } });
  });

  it("blocks unsafe redirect targets without following them", async () => {
    vi.stubGlobal("fetch", vi.fn(async () => new Response(null, { status: 302, headers: { location: "http://127.0.0.1/webhook" } })));
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_redirect_blocked", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://tenant.example.com/api/rows"),
    });

    expect(fetch).toHaveBeenCalledTimes(1);
    expect(fetch).toHaveBeenCalledWith("https://hooks.example.com/rows", expect.objectContaining({ redirect: "manual" }));
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_redirect_blocked", logId: "log_1", status: 0 } });
  });

  it("blocks unsafe webhook URLs and records failed delivery status without fetching", async () => {
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_private", entityId: "entity_1", action: "created", method: "POST", endpoint: "http://10.0.0.1/webhook" },
      { id: "webhook_internal", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://worker.internal/webhook" },
      { id: "webhook_relative_localhost", entityId: "entity_1", action: "created", method: "POST", endpoint: "/webhooks/rows" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://localhost/api/rows"),
    });

    expect(fetch).not.toHaveBeenCalled();
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_private", logId: "log_1", status: 0 } });
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_internal", logId: "log_1", status: 0 } });
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_relative_localhost", logId: "log_1", status: 0 } });
  });

  it("blocks public hostnames that resolve to internal addresses (DNS rebinding) without fetching", async () => {
    entityWebhookMock.findMany.mockResolvedValueOnce([
      { id: "webhook_rebind", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://rebind.attacker.test/webhook" },
    ]);

    await callEntityWebhooks({
      logId: "log_1",
      entityId: "entity_1",
      action: "created",
      body: "payload",
      request: new Request("https://tenant.example.com/api/rows"),
    });

    expect(fetch).not.toHaveBeenCalled();
    expect(entityWebhookLogMock.create).toHaveBeenCalledWith({ data: { webhookId: "webhook_rebind", logId: "log_1", status: 0 } });
  });
});

describe("entity webhook admin boundaries", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("reads a webhook only inside the current entity scope", async () => {
    const webhook = { id: "webhook_1", entityId: "entity_1", action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" };
    entityWebhookMock.findFirst.mockResolvedValueOnce(webhook);

    await expect(getEntityWebhook({ id: "webhook_1", entityId: "entity_1" })).resolves.toEqual(webhook);

    expect(entityWebhookMock.findFirst).toHaveBeenCalledWith({ where: { id: "webhook_1", entityId: "entity_1" } });
  });

  it("updates and deletes only webhooks inside the current entity scope", async () => {
    entityWebhookMock.updateMany.mockResolvedValueOnce({ count: 1 });
    entityWebhookMock.deleteMany.mockResolvedValueOnce({ count: 1 });

    await updateEntityWebhook(
      { id: "webhook_1", entityId: "entity_1" },
      { action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" }
    );
    await deleteEntityWebhook({ id: "webhook_1", entityId: "entity_1" });

    expect(entityWebhookMock.updateMany).toHaveBeenCalledWith({
      where: { id: "webhook_1", entityId: "entity_1" },
      data: { action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" },
    });
    expect(entityWebhookMock.deleteMany).toHaveBeenCalledWith({ where: { id: "webhook_1", entityId: "entity_1" } });
  });

  it("rejects scoped update and delete misses", async () => {
    entityWebhookMock.updateMany.mockResolvedValueOnce({ count: 0 });
    entityWebhookMock.deleteMany.mockResolvedValueOnce({ count: 0 });

    await expect(
      updateEntityWebhook({ id: "webhook_foreign", entityId: "entity_1" }, { action: "created", method: "POST", endpoint: "https://hooks.example.com/rows" })
    ).rejects.toThrow("Entity webhook not found.");
    await expect(deleteEntityWebhook({ id: "webhook_foreign", entityId: "entity_1" })).rejects.toThrow("Entity webhook not found.");
  });
});